Failure Code [Ab00Ke] Charge Voltage Low - Komatsu ecot3 PC300LC-8 Shop Manual

SEN02629-03

Failure code [AB00KE] Charge Voltage Low

Action code Failure code
— AB00KE
Contents of
• While engine is running, signal circuit of alternator detected low charge voltage (below 7.8 V).
trouble
Action of • Displays charge level monitor on machine monitor.
machine monitor • Even if cause of failure disappears, system does not reset itself until starting switch is turned OFF.
Problem that
appears on • If machine is operated as it is, battery may not be charged.
machine
Related infor- • Signal voltage of alternator can be checked with monitoring function. (Code: 04300 Charge voltage)
mation • Method of reproducing failure code: Start engine.
Defective alternator
1
(Low power generation)
Disconnection in wiring har-
ness
2 (Disconnection in wiring or
defective contact in connec-
Possible causes
tor)
and standard
value in normal
state
Ground fault in wiring har-
ness
3
(Short circuit with GND cir-
cuit)
4 Defective machine monitor
8
Charge voltage low
Trouble
(Machine monitor system)
Cause Standard value in normal state/Remarks on troubleshooting
a
R terminal – chassis
a
Wiring harness between CM01 (female) (11)
– J02 – Alternator R terminal
a
Wiring harness between CM01 (female) (11)
– J02 – Alternator R terminal, between
CM01 (female) (11) – J02 – D01 (female) (6)
and between CM01 (female) (11) – J02 –
M17 (female) (2) and chassis ground
a
Between (11) – chas-
Prepare with starting switch OFF, then start engine and carry
out troubleshooting.
Alternator Engine speed
Min. medium speed
ground
Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Prepare with starting switch OFF, then turn starting switch ON
and carry out troubleshooting.
Prepare with starting switch OFF, then start engine and carry
out troubleshooting.
CM01 Engine speed
Min. medium speed
sis ground
40 Troubleshooting
1
Voltage
27.5 – 29.5 V
Resis-
Max. 1 z
tance
Resis-
Min. 1Mz
tance
Voltage
27.5 – 29.5 V
PC300, 350-8